Carburetor attachment



Mm., 2a, 119m Lmwm F. R. HARPER CARBURETOR ATTACHMENT Filed Oct. 26, 1921 aeg, QMMMT Patented Mar., 29, i923 Letal@ l UNET@ STATES PATENT FREEMAN R. HARPER, 0F WOBURN, MASSACHUSETTS.

CARBURETOR ATTACHMENT.

Application filed October 26, 1921. Serial No. 510,484.

To all whom t may concern.'

Be it known that I, FREEMAN R. HARPER, a citizen of the United States, residing at lVobur-n, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Carburetor Attachments, of which the follow in@ is a specification.r

y invention has relation to the carbureting device of a heat engine employing liquid fuel atomized or vaporized and mixed with atmospheric air in a combustible proportion. In such engines a device is provided through which the engine, in operation, draws a current of air, into which current the device sprays gasoline, kerosene or other liquid fuel, which passes with the air current through suitable conduits to the cylinders of the engine in which it is fired and consumed.

For its greatest effectiveness the mixture of air and liquid fuel should, before carburation, be converted into a homogenous gas by the thorough vaporization of the liquid fuel spray and its thorough admiXture in the air. This is the object of all carbureting devices and of all attachments heretofore provided to increase the eiiiciency of the spraying device or carburetor.

My invention is an attachment designed to be used in connection with any carburetor and operates without sensibly restricting or choking the area of the intake pipe of the engine, which is: a designed area for the particular engine, to cause the fuel-laden air current to pass to the engine, in a series of vertical whirls, during which every part of the current is washed along and parallel with short foraminous surfaces, depositing thereon any liquid particles carried in suspension, the liquid particle being held until it vaporizes and passes on with the air current as gas.

In the drawings:

Figure 1 is a side view of my device;

Figure 2 indicates the device, mounted above the carburetor in the intake pipe of a motor;

Figure 3 is a view in plan of the device of Figure l;

Figure l is a view from below of the dcvice of Figure l;

Figure 5 is a View of a detached vane; and I Figure 6 is a diagram of vanes, indicating air movements.

I accomplish the desired object by providing a standard l, mounted upon a gasket base plate B, above a carburetor Cl and axially of the intake pipe, 2, and carrying, spaced along and about the standard, upon arms 3, a multiplicity of deflector vanes Ll, set at an angle to the air current and the axis of the intake pipe. In the drawings I have shown a device having six vanes, but the number may be increased as desired and where the fuel is very heavy and non-volatile it is advantageous to so increase the number of vanes.

The vanes 4 are formed of foraminous material,- preferably copper wire screen, the angle of inclination to the axis of the pipe 2, having the effect of bringing the cross wires more or less in line and presenting to the air current, in effect, a closed surface, necessitating a change of direction in the lcurrent in order to ass through the vane. The effect of this is t at air current passing through the vanes, deposits in the apertures any fuel in liquid form, thus at the outset partially closing the vane and tending to further deflect the air current along the surface of the vane. At the end of any given vane, the air current tends to resume its course parallel to the axis of the pipe and turns suddenly around the edge of the vane into an area of lowered pressure above the vane. Other currents pass directly through the vane and along the upper surface in directions various and complicatedl by meeting currents and vortices moving independently, the air of all the currents rising through the intake pipe and encountering a second vane and later one or more additional vanes. The effect of these changes of direction is to bring fresh portions of the moving air stream into contact with the vanes, forming vortices and whirls in the current which bring to contact with the vanes the mid-portions of the air current sa f and by the rapid vortical movement tlirowing against the vanes and pipe Walls, by centrifugal action, liquid fuel, to be later vaporized by the passing' air.

The arrangement of the Vanes in the air pipe createspraotically no restriction and leaves at all times open the full 4designed area of the pipe. The short surfaces oithe vanes, and their multiplication create violent air direction changes resulting inbringr ing to the vanes all parts of the fuel laden air stream and ejecting liquidV transversely to the air stream or vortex.

The result is to Vprevent any part of the i'uel charged air current from passing. to the motor until all liquid bas been removed and to retain the liquid so removed in position to be acted upon by the air to vaporize it and to thoroughly mix the air and fuel gas to a homogenous condition.v

I claim:

In a gaseous fuel mixing device7 an induction pipe; a foraminous deector element consisting of amultiplicity of vanes angularly disposed about and fast. to a iixed standard coincident with the axis of the inductionv pipe, an annulary space being left between the Walls of the pipe and the free endslof thevanes; means to support the deiector element axially of the pipe.

Signed at Boston, Mass., this 25th day of October, 1921.

FREEMAN n., HARPER. 

